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RISS 인기검색어
- 검색키워드
- 저자 : ( Mahmut Caliskan ) (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
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Isolation and Localization of New Germination-related Sequences from Wheat Embryos
( Mahmut Caliskan ),( Stavros Bashiardes ),( Birgul Ozcan ),( Andrew C. Cuming ) 생화학분자생물학회 2003 BMB Reports Vol.36 No.6
Subtractive library hybridization was used to isolate the cDNA clones that corresponded to the transcripts that were specifically up-regulated during wheat embryo germination. The clones with numbers 55, 6, 7, 8, 24, and 26 appeared to be more abundant in germinating wheat embryos. Among the isolated clones, we identified four new members of the wheat germin gene family. We also identified two novel sequences which exhibited distinct germination up-regulation, and displayed characteristic spatial patterns of expression. One of these, represented by clone pSB10, was principally expressed in the mot tissue of germinating embryos. The second was represented by the pSB7 clone and was expressed in both the mot and shoot primordia of the embryonic axis, as well as within the coleoptile.
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Localization of Germin Genes and Their Products in Developing Wheat Coleoptiles
( Mahmut Caliskan ),( Birgul Ozcan ),( Cemal Turan ),( Andrew C. Cuming ) 생화학분자생물학회 2004 BMB Reports Vol.37 No.3
Germination is a process which characterized with nescient synthesis of genes. Among the genes synthesized during the germination of wheat embryos, germin genes, proteins and their enzymatic activity were defined. Germin is a water soluble homopentameric glycoprotein which is remarkable resistant to degradation by a broad range of proteases including pepsin. Germin proteins found to have strong oxalate oxidase activity which produces hydrogen peroxide by degrading oxalic acid. The current study, aimed to localize the germin genes, proteins and enzymatic activities in developing coleoptiles which is a rapidly growing protective tissue of leaf primordium and shoot apex. Non-radioactively labeled germin riboprobes were employed to localize germin mRNAs in situ. FITC(Fluorescein isothio-cyanate) and alkaline phosphatase linked anti-germin antibodies were used to localize germin proteins under the fluorescence and light microscopy and finally germin enzymatic activity was localized by using appropriate enzyme assay. The results revealed that in coleoptiles germin genes, proteins and their enzymatic activity were predominantly associated with the cells of epidermis and vascular bundle sheath cells.
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Localization of Germin Genes and Their Products in Developing Wheat Coleoptiles
Caliskan, Mahmut,Ozcan, Birgul,Turan, Cemal,Cuming, Andrew C. Korean Society for Biochemistry and Molecular Biol 2004 Journal of biochemistry and molecular biology Vol.37 No.3
Germination is a process which characterized with nescient synthesis of genes. Among the genes synthesized during the germination of wheat embryos, germin genes, proteins and their enzymatic activity were defined. Germin is a water soluble homopentameric glycoprotein which is remarkable resistant to degradation by a broad range of proteases including pepsin. Germin proteins found to have strong oxalate oxidase activity which produces hydrogen peroxide by degrading oxalic acid. The current study, aimed to localize the germin genes, proteins and enzymatic activities in developing coleoptiles which is a rapidly growing protective tissue of leaf primordium and shoot apex. Non-radioactively abeled germin riboprobes were employed to localize germin mRNAs in situ. FITC (Fluorescein isothiocyanate) and alkaline phosphatase linked anti-germin antibodies were used to localize germin proteins under the fluorescence and light microscopy and finally germin enzymatic activity was localized by using appropriate enzyme assay. The results revealed that in coleoptiles germin genes, proteins and their enzymatic activity were predominantly associated with the cells of epidermis and vascular bundle sheath cells.
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Isolation and Localization of New Germination-related Sequences from Wheat Embryos
Caliskan, Mahmut,Bashiardes, Stavros,Ozcan, Birgul,Cuming, Andrew C. Korean Society for Biochemistry and Molecular Biol 2003 Journal of biochemistry and molecular biology Vol.36 No.6
Subtractive library hybridization was used to isolate the cDNA clones that corresponded to the transcripts that were specifically up-regulated during wheat embryo germination. The clones with numbers 5, 6, 7, 8, 24, and 26 appeared to be more abundant in germinating wheat embryos. Among the isolated clones, we identified four new members of the wheat "germin" gene family. We also identified two novel sequences which exhibited distinct germination up-regulation, and displayed characteristic spatial patterns of expression. One of these, represented by clone pSB10, was principally expressed in the root tissue of germinating embryos. The second was represented by the pSB7 clone and was expressed in both the root and shoot primordia of the embryonic axis, as well as within the coleoptile.
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Birgul Ozcan,Miray Yilmaz,Mahmut Caliskan 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.5
Verbascum antiochium Boiss., a member of the Scrophulariaceae family, is endemic to Turkey. The extracts obtained from V. antiochium by increased polarity and direct methanol extraction were tested by the agar well diffusion method against various Gram-positive and Gram-negative bacteria and one fungus. The methanol/water extract exhibited a larger inhibition zone against both the Gram-negative and Gram-positive bacteria than the other extracts. Haemophilus influenzae was found to be the most sensitive bacterium among the bacteria tested. The antioxidant activities of the methanolic extract of V. antiochium were examined by two complementary test systems. The 50% inhibition activity of the methanolic extract of V. antiochium against the free radical 2,2-diphenyl-1-picrylhydrazyl was determined as 4.80mg/mL. In the case of the linoleic acid system, oxidation of linoleic acid was inhibited by the methanolic extract of V. antiochium with 79.92% inhibition, which is close to the value of the synthetic antioxidant reagent, tert-butylated hydroxytoluene. The total phenolic components of V. antiochium were determined to be 92.71mg of gallic acid equivalents/g. Iridoid glycosides, flavonoids and saponins were detected as the major chemical constituents in the extract.
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